Shower wall grout cracking, normal with house settling?
We have 12" marble shower wall tiles, sanded grout, and the shower has been used less than a handful of times, really just to test the floor tile which had issues. Anyway, the tile setter says cracks in wall grout are normal because the house is settling. These cracks are as long as the tiles, so they are not tiny. Our builder doesn't think this is normal. We hired the tile guy ourselves so we need to deal with these issues. I'm just wondering if wall grout cracking is common and to be expected. Thanks.